Loom harness stop motion



Aug. 28, 1934. 1,972,025

LOOM HARNESS STOP MOTION Filed Jan. 15, 1931 2 Sheets-Sheet l I NV EN TOR.

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Aug. 28, 1934.

F. MATTON LOOM HARNESS STOP MOTION .Fild Jan. 15,

1931 2 Sheets-Sheet E 10 E 11 F5412 INVENTOR. @M w;

M ATTORNEY.

Patented Aug. 28, 1934 UNITED STATES PATENT OFFICE Loo M HARNESS STOP MOTION Fabien Matton, Andover, Mass.

Application January 15, 1931, Serial No. 508,950 4 Claims, (01. 139437) This invention relates -to devices for stopping a loom when any of the harness supporting wires or devices breaks or becomes slack.

In some types of looms especially where what is known as the Knowles head motion is used, the harness wires or straps-extend down near the floor and run along horizontally and parallel with each other.

With this type of loom, I prefer to use a balanced trip lever which has an arm which extends down underneath and at right angles to these wires, the lever being pivoted in such a way that if any one of the wires drops on account of any of the harness supports becoming slack or breaking, it will exert the same force on the lever as any other wire.

I may locate a trip lever, which may be balanced by a weight or by a spring or in any other way, in such a position that if certain parts. of the harness supports break, thus letting .down the harness itself, or if any other part of the mechanism breaks, this lever will either allow my drop member to function or will positively pull it down in position where itwill function.

As is well known, there are various types of warp stop motions practically all of which are operated by means of what are known as drop wires. These drop wires generally have an eye through which they are threaded on a removable guide which extends across the loom, thusbeing arranged in one or more lines and each drop wire has at the bottom open legs which straddle a warp thread. Each drop wire is, therefore, normally held up by a warp thread and if that thread breaks. the drop wire drops and operates or allows to operate mechanism for stopping the loom.

There are various types of loom stopping mechanism operated by the action of a single drop wire in dropping and the principal feature of this invention is the provision of an additional member, which I will call a drop member and which may be an additional drop wire or preferably a somewhat stronger and wider member of substantially the same shape as the drop wire, which member is separately supported by holding rods or holding devices which connect it with a trip lever or trip mechanism which is caused to function when any of the harness supports'breaks or when a harness itself drops below a certain position. Y

In the drawings, Fig. 1 is a diagrammatic side elevation of those parts of a well known type of loom which are particularly concernedwith this invention.

Fig. 2 is a rear elevation of the rocking lever.

Figs. 3, land 5 are diagrammatic elevations showing the manner in which a harness is supported and what happens when the harness supporting members break.

Fig. 6 is a perspective view of some of the drop wires and a drop member.

Figs. 6A and 6B are details of construction of the rocker arm.

Figs. 7, 8 and 9 are side elevations of diiferent types of drop member for use with various types of stop motion.

Fig. 10 is a vertical section of the drop wire and parts as viewed from the left of Fig. 9.

Fig. 11 is a side elevation of my preferred form of drop member.

- Fig. 12 is a perspective View showing a modification of the assembly of drop wires and drop member with rocker arm.

7 Figs. 13, 14, 15, 16, 17 and 18 are diagrammatic views substantially similar to Fig. 1 showing modifications of the invention.

In the drawings, C represents a loom in which there is a warp beam 1, a whip roll 2, a cross girt 3 supported at the back by the back girt 4 and at the front by the front girt 400.

Each harness is represented asby D and each harness is supported by one or more top harness straps such as 20 which pass over loose pulleys 21 and are attached to one arm of the harness jack 22.

At the bottom there are bottom harness straps or wires such as 23, 23 which are connected and attached to another strap or wire 24 which passes over a loose pulley 25.

Another bottom harness strap or wire 26 connects with the other arm of harness jack 22 and passes over a loose pulley 27.

Between the ends of the straps 24 and 26 is a horizontal wire 29 which is ordinarily kept taut and level by the suitable adjustment of the top and bottom harness straps.

A, A represent drop wires of a well known type each including an eye 5 through which it is threaded onto a guide and supporting rod 6 and each having legs 7 which straddle a warp thread W in a' well known manner.

G- represents well known means for stopping a loom including a frame 8 and an oscillator 10 which when a drop wire A drops forces it against one of the hired stop rods 9 which stops the movement of the oscillator and thereby stops the loom. f

L represents a drop member which is substantially the same size and shape as a drop wire A having as shown a passage 15 which corresponds with the eye 5 and legs 17 which correspond with the legs 7, but which are preferably thicker.

It also has a pivot hole 1 1 by which it is loosely pivoted to one end 63 of the rocker arm R pivoted to a bracket at 71 and at its other end 62 to one end of the holding rod H.

13 represents a balanced trip lever having a free arm 30 ending in a tip 31 which extends down under the wires 29 as shown in Fig. 1 and thence extends up at 32 being again bent at right angles to form the pivot section 33 which is pivoted in the bearing sockets 34, 34-and; at 35 carries the balanced arm 36 which carries at one end 37 the adjustable weight 11 and is pivoted at the other end 38 to the other end of holding rod I-I.

As shown, holding rod H is made in two sections 61 and 64-. carried by a turnbuckle 60 whereby it can be adjusted in length so asto' position drop member L in line with the drop wires A, A.

In the type of stop motion shown in Figs. 1, 2 and 5, if any part of the harness supporting means M breaks or becomes slack, the horizontal wire 29 falls on the part 39 of the balanced trip lever 5 thus depressing it and lifting the end 36 which lifts holding rod 11 and depresses the end or rocker arm R carrying member L which, therefore, acts as one of the drop wires and beingstruck by one of the oscillators 10 causes the loom to stop.

As shown in Fig. 6, I prefer to use a lock F which comprises a bell crank lever pivoted on bracket '70 at 91 and having a weighted arm 93 and another arm 99 with a projection 92 which when the loom is in action bears against the side of rocker arm R, but when H moves up in the direction of the arrow, this projection 92 moves under arm F thus locking it in position.

There are several diiierent types of drop wires and appropriate drop members shown in Figs. 7, 8, 9, 10 and 11.

In every case, these drop members preferably are held between stop rods 9, 9, to keep them in place, and in every case they may be suspended, by mechanism to be described, in line with the drop wires which are of substantially the same shape and size.

Member 186 has the legs 40 to rest on a warp thread and an eye 182 which is larger at the bottom than it is at the top 131. The square shaft 112 oscillates from side to side, as shown by the arrows, until a drop wire or member 180 drops whereupon eye 181 stops shaft 112 from moving thus stopping the loom. I

Member 280, or its corresponding drop wires, has an eye 281 pointed at the top and legs41 and is threaded onto a square fixed rod or shaft 212 along the top of which is insulation 214 and on this a conductor 213. When member 280 drops, the circuit between 213 and 212 is closed by 280 and the loom is stopped.

Member 380 and the corresponding drop wires has a rectangular eye 381 and legs 42 and is threaded on a channel 312 which has suitable teeth and in which reciprocates a rod. 313 with depressions 314 whereby when member 380 drops, it locks the part together stopping themotion of 313 and thereby stopping the loom. 1

These types are all old and well known and in every case my drop member is made of substantially the same shape and size as the corresponding drop wires but may or may not be thicker.

My drop member may be at theend of a row of drop wires or interposed somewhere in the middle, but it should normally be held in line with the line of drop wires.

When a harness support breaks and trip mechanism is operated, this may operate to allow my drop member to drop or may positively pull it down in the way hereintofore described or in any of the following ways.

Figs. 13, 14, 15, 16, 17 and 18 are substantially diagrammatic and in each case L represents a drop wire and D one or more harnesses.

11 indicates a counterweight and 12 a stop, while 13 represents a spring which serves the same purpose as a counterweight.

In some cases, the trip member is a balanced lever and in other cases a tightly stretched cord, chain or wire. I

In Fig. 13, P represents a trip lever similar in all respects to B, except that the counterweight 11 is on the end 38, while a holding rod 50 is connected to the other end 37. This rod 50 is bent at right angles and fastened in any way at 51 to drop member L. v

The result of this construction is that when wire 29 falls on the free end or" the lever P, holding rod 50 with its arm 51 positively pull down drop member L instead of letting it drop and there is no rocker arm such as R extending up above the drop wires.

In Fig. 14, a balanced trip lever 52 is pivoted at 53 below and between the harnesses D and the drop member L but well above the wires 29. The

short arm of this lever is pivoted to a holding arm 5-: which in turn is pivoted at one end of a rocker arm 55 similar in all respects to R and carrying at its other end a drop member L.

This construction is more compact but will ordinarily operate only when one of the top harness wires such as 20 breaks allowing a harness to drop on lever 52 although it may operate if any of the other harness supporting means breaks in some cases.

In Fig. 15, instead of a balanced trip lever, there is shown alever 56 pivoted to the frame at 5'7 and extending under the wires 29. To the free end of lever 56 is attached-a holding arm 50, substantially the same as the other shown in Fig. 13, hav ing a bend 51 which carries a drop member L. When a wire 29 drops, it operates to pull down member'L.

In Fig. 16 is shown a lever 58 pivoted to the frame'at 59 in a position well above the Wires 29 anddirectly under the harnesses D, D.

At the free end of lever 58 is a holding rod 158 which is suitably bent and fastened to a drop member L whereby when a harness breaks member L is pulled down.

Instead of using a triplever, I can use a trip member including a cord such as shown in Figs. 17 and 18. y

In Fig. 17, a cord 14 is attached to the loom frame at 16 and extends under wires 29 thence under a pulley 18 the end being attached to one end of a rockerarmllQ to the other end of which is fastened a cord 119 which extends over a pulley 120 thence down to the top of the drop member L.

When wire 29 drops, it pulls on cord 14 thus loosening cord 119 and member L drops by its own weight. 1

In Fig. 18, is shown a cord 100 fastened to the loom frame 101 so that it can extend under the wires 29 and around a pulley 102 thence up to the middle part of an arm 103 which at end 104 is pivoted to the frame and at the other end carries a drop member L. With this construction,

when a wire 29 drops on cord 100, member L is positively pulled down.

In removing and replacing a row of drop wires in a loom, the whole row is generally carried on a rod such as 6 as shown in Fig. 1 and I can use a drop member with legs which are connected below the rod opening thus forming an eye, but I prefer to omit this as shown in Figs. 1, 6 and 11 to 16.

When my drop member is made with a closed eye, it goes with the other drop wires on rod 6 for use on the next warp.

Naturally in such case, the drop member must be so connected to a lever or other part that it can readily be detached.

I prefer, however, to use a member with an open eye and to not only connect it as to a rocker arm R detachably as by being put on a hook 215 as shown in Fig. 6A, but I also prefer to make the pivot for rocker arm R removable as by using a screw such as shown in Fig. 63 part of which is threaded into threads in bracket and the other part of which is plain to serve as a pivot for arm R.

Whichever kind of drop member is used, this pivot 71 can be removed and arm R thrown over and back carrying with it member L as shown by the dotted lines in Fig. 1 or if the other type of drop member is used, it will merely be thrown back alone.

Instead of a pivot such as 71, I can as shown in Fig. 12 remove the bracket such as 75 by removing a wing nut '74 thus allowing the bracket as well as the arm to be swung up out of the way.

In the claims, I intend to include by the word wires, any of the straps, hooks, eyes or other means for supporting or controlling a harness.

It is also clear that if the harness supporting devices become loose or slack, the same efiect will be produced as if some part broke.

I claim:

1. In a loom having a frame, and a harness supported at the top by top harness wires and held at the bottom by bottom harness wires part of which extend horizontally, said loom including a plurality of drop wires each adapted to be supported by a warp thread substantially side by side in a straight line, and means associated with the drop Wires for stopping the loom when a drop wire drops; the combination of a drop member of substantially the size and shape of a drop wire, said member being hung on the back end of a rocker arm; said rocker arm pivoted medially to the frame; a balanced trip lever one end of which extends under the horizontal part of the bottom harness wires; together with a holding rod between the other end of the trip lever and the front end of the rocker arm.

2. In a loom having a frame, and a harness, said loom including a plurality of drop wires each adapted to be supported by a warp thread substantially side by side in a straight line and means associated with the drop wires for stopping the loom when a drop wire drops; the combination of a drop member of substantially the size and shape of a drop wire, said member being hung on the back end of a rocker arm; said rocker arm pivoted medially to the frame; a balanced trip lever one end of which extends under the harness; together with a holding rod between the other end of the trip lever and the front end of the rocker arm.

3. In a loom including a harness, and means to support said harness, said loom including a plurality of drop wires each adapted to be supported by a warp thread substantially side by side in a straight line and means associated with the drop wires for stopping the loom when a drop wire drops; the combination of a drop member of substantially the size and shape of a drop wire; and means of such character as to normally hold the drop member substantially in line with the drop wires but to cause it to drop to the loom stopping position when any part of the harness supporting means breaks; together with automatic means to lock such drop member in the down position when it drops.

4. In a loom having a frame, and a harness supported at the top by top harness wires and held at the bottom by bottom harness wires part of which extend horizontally, said loom including a plurality of drop wires each adapted to be supported by a. warp thread substantially side by side in a straight line and means associated with the drop wires for stopping the loom when a drop wire drops; the combination of a drop member of substantially the size and shape of a drop wire, said member being hung on a pivoted arm; a trip member which extends under the horizontal part of the bottom harness wires; and connections between the drop member and the trip member whereby when the trip member drops, the drop member is forced down, but

is normally held substantially in line with the drop wires.

FABIEN MAT'I'ON. 

